38/100
2012Two SeatersPremium

2012 Porsche Boxster S

EPA ID: 31094
19
City MPG
21
Combined MPG
21MPG· Average
26
Highway MPG

Fuel Economy Overview

The 2012 Porsche Boxster S achieves an EPA-estimated 21 MPG in combined city and highway driving, with 19 MPG in the city and 26 MPG on the highway. Powered by a 3.4L 6-cylinder engine paired with a manual 6-spd, this two seaters features Rear-Wheel Drive drive.

In terms of environmental impact, the 2012 Boxster S produces approximately 423 grams of CO2 per mile. This figure is measured under standardized EPA test conditions and represents tailpipe emissions only. For context, the average new vehicle sold in the United States produces approximately 400 grams of CO2 per mile, meaning this Boxster S has higher-than-average emissions in this regard.

The estimated annual fuel cost for this vehicle is $3,300, based on 15,000 miles of driving per year and current national average fuel prices. Compared to the average new vehicle, you would save $5,750 over a 5-year period. This calculation accounts for differences in fuel consumption efficiency and provides a practical measure of long-term ownership costs attributable to fuel economy.

Energy DNA

Vehicle ClassTwo Seaters
Fuel TypePremium
Engine3.4L 6-cyl
AspirationNaturally Aspirated
TransmissionManual 6-spd
Drive TypeRear-Wheel Drive

Green Scorecard

CO2 Emissions423 g/mi
Start-Stop SystemNot Equipped
GHG Score-1/10
Smog RatingN/A
Est. Annual Cost$3,300
5-Year Cost DeltaSave $5,750

Personalized Commute CalculatorEPA defaults to 55% City / 45% Hwy

55% City45% Highway

Adjust the slider to match your daily driving habits. City driving involves stop-and-go traffic under 45mph, while highway driving represents sustained speeds over 55mph.

Your Real MPG
21.6
Impact vs EPA
$-72
/ year
💨

Aerodynamic Speed Penalty

EPA highway tests average roughly 48 mph. Driving at 75 mph increases aerodynamic drag exponentially. Expect your real-world highway fuel economy to drop by roughly 15-20% at interstate speeds.

5-Year Total Cost of Ownership

Estimated Monthly Cost
$1,369/mo
Includes estimated depreciation, fuel, insurance, and state fees over 5 years. Does not include loan interest.
15,000 mi
Value Depreciation
Est. value lost over 60 months
$46,200
56.3%
Fuel & Electricity
Based on National Average rates ($3.50/gal)
$12,500
15.2%
Estimated Insurance
Based on vehicle class risk profile
$23,010
28.0%
State Registration Fees
Based on National Average DMV base rates
$400
0.5%
Total 5-Year Cost$82,110

Recall Intelligence

Campaign #11V409000·2011-09-02
critical
Component: SEAT BELTS

PORSCHE IS RECALLING CERTAIN MODEL YEAR 2011 911 SPEEDSTER AND 911 GTS RS 4.0; AND MODEL YEAR 2012 BOXSTER (INCLUDING S AND SPYDER); CAYMAN (INCLUDING S AND R); 911 CARRERA (INCLUDING S, GTS, 4, 4S, AND 4 GTS); 911 TARGA 4 AND TARGA 4S; AND 911 TURBO AND TURBO S MODELS MANUFACTURED FROM MAY 31, 2011, THROUGH JUNE 10, 2011. THERE IS A POSSIBILITY THAT THE MOUNTING HOLES IN THE SEAT BELT ANCHOR PLATES FITTED TO THE VEHICLE ARE TOO SMALL. IF THE HOLE DIAMETER IS TOO SMALL, THE ANCHOR PLATE MAY NOT BE ABLE TO ROTATE ABOUT THE FASTENING BOLT AS DESIGNED.

Consequence & Remedy

Consequence: SHOULD THIS OCCUR, THE SEAT BELT MAY NOT BE ROUTED OPTIMALLY AROUND THE OCCUPANT, OR MAY POTENTIALLY LOOSEN AT SOME POINT IN THE FUTURE INCREASING THE RISK OF INJURY DURING A CRASH.

Remedy: PORSCHE WILL NOTIFY OWNERS, AND DEALERS WILL INSPECT THE SEAT BELT ANCHORS AND, IF NECESSARY, REPLACE THE SEAT BELT. THE REPAIRS WILL BE PERFORMED FREE OF CHARGE. THE SAFETY RECALL BEGAN ON SEPTEMBER 2, 2011. OWNERS MAY CONTACT PORSCHE AT 1-800-767-7243.

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Looking for comprehensive historical data?

NHTSA FARS (Fatal Crash History) and broader generational safety trends are aggregated at the model level rather than by specific engine configurations. View the complete historical data profile for all Porsche Boxster S configurations.

View Model History

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Fuel Cost Analysis

Annual Fuel Cost$3,300
vs. Avg Vehicle (5 yrs)Save $5,750

Based on 15,000 miles/year and current fuel prices.

Efficiency Breakdown

City19 MPG
Highway26 MPG
Combined21 MPG

Estimated Lifetime Carbon Footprint

(Based on 200,000 miles driven)

84.6 metric tons CO₂
Equivalent To:
🌳 105 tree seedlings grown for 10 yrs
✈️ 7.1 cross-country flights/yr

Data Provenance

Data directly from the EPA National Vehicle and Fuel Emissions Laboratory. The combined rating is a weighted average (55% city, 45% highway). For official figures, visit fueleconomy.gov.